Surface magnetized MgAl-LDHs and MgAl-LDO with excellent adsorption capacity and convenient recovery for the removal of U(VI)

Tao, Qinqin; Lin, Shu; Bai, Tengsai; Xie, Jinhua; Dai, Ying

doi:10.1007/s10967-022-08740-0

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…The above positive movement phenomenon may occur due to the deposition of BiVO4 on MgAl-LDHs. This deposition changes the local chemical environment so that BiVO4 can act as an acceptor to receive photogenerated electrons transferred from MgAl-LDHs; related studies have resulted in similar conclusions [54,55]. Contrary to the direction of movement of the abovementioned orbital electron binding energy, unlike pure MgAl-LDHs, the electron binding energy at Al 2p in BiVO4/MgAl-LDHs moves inversely from 74.15 to 74.13 eV (Figure 6f), which may be related to the newly formed unstable bond in the composite [56].…”

Section: Effect Of Firing Temperaturementioning

confidence: 80%

Adsorption and Visible Photocatalytic Synergistic Removal of a Cationic Dye with the Composite Material BiVO4/MgAl–LDHs

Wang,

Xu,

Cai

et al. 2023

Materials

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Adsorption and photocatalysis are effective in removing organic pollutants from wastewater. This study is based on the memory effects of MgAl–layered double hydroxides (MgAl–LDHs) after high-temperature calcination. By introducing bismuth vanadate (BiVO4) during the reformation of the layered structure via contact with water, a composite material BiVO4/MgAl–LDHs with enhanced adsorption and visible light catalytic performance was synthesized. The effects of the calcination temperature, ratio, initial methylene blue (MB) concentration, and catalyst dosage on the adsorption and photocatalytic performance were investigated. The BiVO4/MgAl–LDHs showed better photocatalytic performance than the pure BiVO4 and MgAl–LDHs. Under the optimal conditions, the proportion of MB adsorbed in 20 min was 66.1%, and the percentage of MB degraded during 100 min of photolysis was 92.4%. The composite photocatalyst showed good chemical stability and cyclability, and the adsorption-degradation rate was 86% after four cycles. Analyses of the adsorption and photocatalytic mechanisms for the composite material showed that synergistic adsorption and visible light photocatalysis contributed to the excellent catalytic performance of the BiVO4/MgAl–LDHs. A highly adsorbent photocatalytic composite material exhibiting outstanding performance was prepared via a simple, cost-effective, and environmentally friendly method, providing reference information for the removal of organic pollutants from liquids.

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Section: Effect Of Firing Temperaturementioning

confidence: 80%